CN111943307A - Photocatalytic sewage treatment reagent and using method thereof - Google Patents
Photocatalytic sewage treatment reagent and using method thereof Download PDFInfo
- Publication number
- CN111943307A CN111943307A CN201910416837.7A CN201910416837A CN111943307A CN 111943307 A CN111943307 A CN 111943307A CN 201910416837 A CN201910416837 A CN 201910416837A CN 111943307 A CN111943307 A CN 111943307A
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- China
- Prior art keywords
- photocatalytic
- reagent
- sewage
- sewage treatment
- strontium
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention provides a photocatalytic sewage treatment reagent and a using method thereof, wherein the treatment reagent consists of a photocatalytic reagent, an auxiliary agent, a high-grade oxidizing agent and EDTA (ethylene diamine tetraacetic acid), the high-grade oxidizing agent is potassium hydrogen persulfate, the mass ratio of the potassium hydrogen persulfate to the photocatalytic reagent is 1:2, the auxiliary agent is sodium carbonate, and the mass ratio of the EDTA to the photocatalytic reagent is 2: 3, the photocatalytic reagent is composed of nitrogen-doped titanium dioxide and strontium-doped lanthanum rhodanate, the mass ratio of the nitrogen-doped titanium dioxide to the strontium-doped lanthanum rhodanate is 1:1, and the molar ratio of lanthanum element to strontium element in the strontium-doped lanthanum rhodanate is 3: 2; according to the photocatalytic sewage treatment reagent and the using method thereof, organic pollutants in sewage are efficiently decomposed in a photocatalytic manner, heavy metal ions in the sewage are removed, secondary pollution is avoided, the organic pollutants in the sewage can be decomposed in a natural light catalytic manner by the photocatalytic reagent, and compared with ultraviolet light catalytic decomposition and ultrasonic decomposition, energy is greatly saved.
Description
Technical Field
The invention relates to the technical field of photocatalytic sewage, in particular to a photocatalytic sewage treatment reagent and a using method thereof.
Background
China is one of 13 water-deficient countries in the world, nearly 400 major and middle cities in China currently have water shortage, and the total water shortage reaches 2000 ten thousand meters3With the development of modern industry and the increase of living demands of people, advanced treatment and recycling of sewage are one of the most effective means for relieving water resource shortage. Domestic sewage or municipal drainage, effluent of municipal sewage treatment plants and industrial drainage reaching the standard are water resources which can be recycled through advanced treatment. Therefore, a sewage treatment technology which can save energy and has no secondary pollution is needed.
Disclosure of Invention
Technical problem to be solved
In view of the above technical problems, an object of the present invention is to provide a photocatalytic wastewater treatment agent and a method for using the same, so as to solve at least one of the above problems.
(II) technical scheme
According to one aspect of the present invention, there is provided a photocatalytic sewage treatment agent, characterized in that the treatment agent is composed of a photocatalytic agent, an adjuvant, a higher oxidizing agent and EDTA.
In some embodiments, the photocatalytic agent is comprised of nitrogen-doped titanium dioxide and strontium-doped lanthanum gluconate with a mass ratio of nitrogen-doped titanium dioxide to strontium-doped lanthanum gluconate of 1: 1.
In some embodiments, the molar ratio of lanthanum element to strontium element in the strontium-doped lanthanum tungstate is 3: 2.
In some embodiments, the nitrogen-doped titania has a molar ratio of nitrogen to titanium of 1: 25.
In some embodiments, the higher oxidant is oxone and the mass ratio of oxone to photocatalytic agent is 1: 2.
In some embodiments, the adjuvant is sodium carbonate.
In some embodiments, the mass ratio of EDTA to photocatalytic agent is 2: 3.
a method for using a photocatalytic sewage treatment reagent comprises the following steps:
measuring the pH value of the sewage, wherein the pH value is more than or equal to 7, adding a photocatalytic reagent, if the pH value is less than 7, adding an auxiliary agent into the sewage and stirring until the pH value is more than or equal to 7, and then adding the photocatalytic reagent;
stirring for one hour under natural light;
adding a high-grade oxidant, and stirring for one hour;
EDTA was added and stirred for one hour.
In some embodiments, the concentration of the photocatalytic agent in the wastewater is 10 mg/mL.
(III) advantageous effects
According to the technical scheme, the invention has the following beneficial effects:
(1) the organic pollutants in the sewage are decomposed by high-efficiency photocatalysis, heavy metal ions in the sewage are removed, and no secondary pollution is caused.
(2) The photocatalytic reagent can be used for decomposing organic pollutants in sewage by using natural light catalysis, and compared with ultraviolet light catalysis decomposition and ultrasonic decomposition, the photocatalytic reagent greatly saves energy.
(3) The advanced oxidant oxidizes the organic pollutants in the sewage, can oxidize the organic pollutants which are not decomposed by natural light catalysis in the sewage, and improves the degradation rate of the organic pollutants.
(4) The EDTA can chelate heavy metal ions in the sewage, remove the heavy metal ions in the sewage and prevent secondary pollution caused by the photocatalytic reagent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of the preparation of the photocatalytic reagent of the present invention;
FIG. 2 is a schematic diagram of the method of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
To facilitate understanding of the present embodiment, first, a photocatalytic sewage treatment reagent and a method for using the same disclosed in the embodiments of the present invention are described in detail, as shown in fig. 1, the photocatalytic sewage treatment reagent is composed of a photocatalytic reagent, an auxiliary agent, a higher oxidant and EDTA, the higher oxidant is oxone, a mass ratio of oxone to the photocatalytic reagent is 1:2, the auxiliary agent is sodium carbonate, and a mass ratio of EDTA to the photocatalytic reagent is 2: 3, the photocatalytic reagent is composed of nitrogen-doped titanium dioxide and strontium-doped lanthanum rhodanate, the mass ratio of the nitrogen-doped titanium dioxide to the strontium-doped lanthanum rhodanate is 1:1, and the molar ratio of lanthanum element to strontium element in the strontium-doped lanthanum rhodanate is 3: 2.
The strontium-doped lanthanum cobalt drilling acid is prepared by the following steps of preparing 1mol/L lanthanum nitrate solution, 1mol/L cobalt nitrate solution and 1mol/L strontium nitrate solution, mixing and stirring 6mL lanthanum nitrate solution, 4mL strontium nitrate solution and 10mL cobalt nitrate solution, adding citric acid, enabling the molar concentration of the citric acid to be 1:1 relative to the molar concentration of total metal ions in the solution, stirring and mixing uniformly, dropwise adding 28% by mass of ammonia water solution to enable the pH to be 9-9.5, enabling the metal ions to be completely precipitated, transferring the obtained product to a reaction kettle, placing the reaction kettle in a constant temperature box at 150 ℃, preserving heat for 24 hours, washing a product after reaction, drying at 120 ℃ for 10 hours, placing the product in a muffle furnace at 650 ℃ for calcining for 2 hours, and grinding the obtained product to obtain the strontium-doped lanthanum cobalt drilling acid.
The molar ratio of nitrogen element to titanium element in the nitrogen-doped titanium dioxide is 1:25, the nitrogen-doped titanium dioxide is prepared by the following steps of mixing butyl titanate and absolute ethyl alcohol, dropwise adding glacial acetic acid, distilled water and absolute ethyl alcohol under strong stirring to enable the pH to be 6-8, continuing to stir under strong stirring for 30 minutes after the dropwise adding is finished, adding 1mol/L ammonia water into the mixed solution to enable the molar ratio of the nitrogen element to the titanium element to be 1:25, continuing to stir for 60 minutes, standing at room temperature for 24 hours, drying in a constant temperature oven at 120 ℃ for 10 hours, grinding, calcining in a muffle furnace at 600 ℃ for 3 hours, and grinding the obtained product to obtain the nitrogen-doped titanium dioxide.
As shown in FIG. 2, a method for using a photocatalytic sewage treatment reagent comprises the following steps:
measuring the pH value of the sewage, wherein the pH value is more than or equal to 7, adding a photocatalytic reagent, if the pH value is less than 7, adding an auxiliary agent (sodium carbonate) into the sewage and stirring until the pH value is more than or equal to 7, then adding the photocatalytic reagent, wherein the concentration of the photocatalytic reagent in the sewage reaches 10mg/mL, stirring for one hour under the irradiation of natural light, adding a higher oxidant, wherein the higher oxidant is potassium hydrogen persulfate, the mass ratio of the addition amount of the potassium hydrogen persulfate to the addition amount of the photocatalytic reagent is 1:2, stirring for one hour, adding a certain amount of EDTA, the mass ratio of the addition amount of the EDTA to the addition amount of the photocatalytic reagent is 1:2, and stirring for one hour.
According to the technical scheme, the photocatalytic sewage treatment reagent and the using method thereof provided by the invention have the following beneficial effects:
(1) according to the invention, organic pollutants in the sewage are efficiently decomposed through photocatalysis, heavy metal ions in the sewage are removed, and secondary pollution is not caused.
(2) In the invention, the photocatalytic reagent can be used for decomposing organic pollutants in sewage by using natural light catalysis, and compared with ultraviolet light catalysis decomposition and ultrasonic decomposition, the photocatalytic reagent greatly saves energy.
(3) In the invention, the high-grade oxidant oxidizes the organic pollutants in the sewage, can oxidize the organic pollutants which are not decomposed by natural light catalysis in the sewage, and improves the degradation rate of the organic pollutants.
(4) In the invention, EDTA can chelate heavy metal ions in the sewage, remove the heavy metal ions in the sewage and prevent secondary pollution caused by the photocatalytic reagent.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a photocatalysis sewage treatment reagent which characterized in that: the treatment reagent consists of a photocatalytic reagent, an auxiliary agent, a high-grade oxidant and EDTA.
2. The photocatalytic sewage treatment reagent according to claim 1, wherein the photocatalytic reagent is composed of nitrogen-doped titanium dioxide and strontium-doped lanthanum rhodanate, and the mass ratio of the nitrogen-doped titanium dioxide to the strontium-doped lanthanum rhodanate is 1: 1.
3. The photocatalytic sewage treatment reagent according to claim 2, wherein the molar ratio of lanthanum element to strontium element in the strontium-doped lanthanum rhodanate is 3: 2.
4. The photocatalytic sewage treatment reagent according to claim 2, wherein the molar ratio of nitrogen element to titanium element in the nitrogen-doped titanium dioxide is 1: 25.
5. The photocatalytic sewage treatment reagent according to claim 1, wherein the higher oxidant is oxone, and the mass ratio of oxone to photocatalytic reagent is 1: 2.
6. The photocatalytic sewage treatment agent according to claim 1, wherein the auxiliary agent is sodium carbonate.
7. The photocatalytic sewage treatment reagent according to claim 1, wherein the mass ratio of EDTA to the photocatalytic reagent is 2: 3.
8. a method for using a photocatalytic sewage treatment reagent comprises the following steps:
measuring the pH value of the sewage, wherein the pH value is more than or equal to 7, adding a photocatalytic reagent, if the pH value is less than 7, adding an auxiliary agent into the sewage and stirring until the pH value is more than or equal to 7, and then adding the photocatalytic reagent;
stirring for one hour under natural light;
adding a high-grade oxidant, and stirring for one hour;
EDTA was added and stirred for one hour.
9. The method of claim 8, wherein the concentration of the photocatalytic reagent in the wastewater is 10 mg/mL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910416837.7A CN111943307A (en) | 2019-05-17 | 2019-05-17 | Photocatalytic sewage treatment reagent and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910416837.7A CN111943307A (en) | 2019-05-17 | 2019-05-17 | Photocatalytic sewage treatment reagent and using method thereof |
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| CN111943307A true CN111943307A (en) | 2020-11-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5779912A (en) * | 1997-01-31 | 1998-07-14 | Lynntech, Inc. | Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient oxidant |
| CN101596457A (en) * | 2009-07-06 | 2009-12-09 | 宁波山泉建材有限公司 | The nano titanium dioxide photocatalyst and the preparation method of boron and other element codope |
| CN105582939A (en) * | 2016-03-15 | 2016-05-18 | 河北工业大学 | Preparation method of visible-light response nano La/Ni-SrTiO3 |
| CN105884100A (en) * | 2016-06-08 | 2016-08-24 | 浙江奇彩环境科技股份有限公司 | Heavy metal wastewater treatment method |
-
2019
- 2019-05-17 CN CN201910416837.7A patent/CN111943307A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5779912A (en) * | 1997-01-31 | 1998-07-14 | Lynntech, Inc. | Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient oxidant |
| CN101596457A (en) * | 2009-07-06 | 2009-12-09 | 宁波山泉建材有限公司 | The nano titanium dioxide photocatalyst and the preparation method of boron and other element codope |
| CN105582939A (en) * | 2016-03-15 | 2016-05-18 | 河北工业大学 | Preparation method of visible-light response nano La/Ni-SrTiO3 |
| CN105884100A (en) * | 2016-06-08 | 2016-08-24 | 浙江奇彩环境科技股份有限公司 | Heavy metal wastewater treatment method |
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Application publication date: 20201117 |